KFC inability to resolve online gift voucher error

I have to use this platform to raise my complaint as I have use all avenues with KFC to have this resolved to no avail as to date.I have bought an online gift voucher of R40 on the 23/06/2024 on the KFC app. On the 17th of July 2024 I tried to use the voucher on the app to buy a streetwise 2 which I successful used the voucher and the outlet I used for collection was KFC sanctuary in Somerset West but I didn't received an sms or email for my order. I went to the outlet to collect my order in the hope that the order will appear on the system which in the end did not. I spoke to the manager that was on duty Siya and explain to her and even show her the wicode I have used. I tried the voucher again but I got an error saying that the voucher is in use. She took my detail and the code and have not hear from her ever since. I then log a call on there app and was said I will get a response in 5 working days no reply as of yet. I then called KFC call centre on the 22/07/2024 and I spoke to a gentleman and he logged my complaint and said they will investigate and will come back to me. Till today no one have contact me to say what happened or how we can resolved this issue. If this is how KFC deals with there concerns and complaints then they lost a loyal client of theirs. I hope we can resolve this and have my trust in you again. You should keep your promises you made to customers that you wil look into the issue but in this case I have been dropped and it sad to see a big company that don't even look at there online complaints system.

Hope to hear from anybody

Ricardo